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  • Bit functions speedI just stared nonplussed at the documentation for the bit functions. Apparently, if you're using the accumulator, using AND and OR is faster than se…

    ... set was to add 'modifier' opcodes. Ie a single byte $cb ...
    Alcoholics Anonymous Alcoholics Anonymous February 2010 Development
  • Bit functions speedI just stared nonplussed at the documentation for the bit functions. Apparently, if you're using the accumulator, using AND and OR is faster than se…

    ... is executing, the next is decoding, and the next is being ...
    Winston Winston February 2010 Development
  • Z80 compressorIs there one available? Is it any good? Peeps have been suggesting we should look into this, so here's a new thread! I'd do the compressor on the …

    ... and c are updated for decoding the next symbol
    ; uses ...
    Alcoholics Anonymous Alcoholics Anonymous February 2010 Development
  • Z80 compressorIs there one available? Is it any good? Peeps have been suggesting we should look into this, so here's a new thread! I'd do the compressor on the …

    ... . (I don't mean just decoding lots of little chunks here ... each chunk (optional), and the decoding tree are added to the ... given the address of the decoding tree/dictionary and the address ...
    joefish joefish February 2010 Development
  • Joystick interface for connecting USB game controllers to ZX Spectrum/Timex(or other)Hi, I'm developing interface as mentioned in subj. I test it yesterday on my Timex 2048 and works perfectly with my Genius gamepad (MaxFire G-08XU). …

    ... space for additional code for decoding buttons in the games.
    micky micky March 2010 Hardware
  • tricks to simplify codingWhen i started with programming in assembler i had very simple approach to do things. Just shifting bytes around, doing simple tests and so... Later …

    ... had loads of made-up opcodes to produce the Z80 Gameboy ...
    frobush frobush March 2010 Development
  • Multiple interface questionWhat's going to happen if I plug in an AGF programmable joystick interface, then plug a Kempston (compatible) interface into the back of that? Will …

    ... lot of partial address bus decoding going on. (This is a ...
    Winston Winston April 2010 Hardware
  • DivIDE and joystick interfaceWhich joystick interface works with the DivIDE and ZX 48K? I have TurboRAM but it works not correct or blocks DivIDE. Multiface One works with the j…

    I have ofter seen so called Kempston IFs without /RD. This is not a bug that accidently crept in, but an issue of money-making by saving one chip. Expand the decoding, now the interface is open!
    roko roko April 2010 Hardware
  • DivIDE and joystick interfaceWhich joystick interface works with the DivIDE and ZX 48K? I have TurboRAM but it works not correct or blocks DivIDE. Multiface One works with the j…

    ... KEMPSTON INTERFACE with better port decoding

    b) fix this ...
    velesoft velesoft April 2010 Hardware
  • DivIDE and joystick interfaceWhich joystick interface works with the DivIDE and ZX 48K? I have TurboRAM but it works not correct or blocks DivIDE. Multiface One works with the j…

    ... KEMPSTON INTERFACE with better port decoding

    b) fix this ...
    Alien 8 Alien 8 April 2010 Hardware
  • component out?I would like to connect ZX48K to plasma TV with component cable. I read somewhere that signals are on the expansion edge connector. Do I need somethi…

    ... would be better. Less encoding/decoding means better pic. Plus, as ...
    piters piters April 2010 Hardware
  • What do I need to have a faster computer?My computer struggles a bit to play back large videos. DVDs playback fine, (and the CPU load is between 35% and 45%), but if the resolutions is highe…

    ... are capable of offloading the decoding of videos off the CPU ...
    merseymal merseymal May 2010 Chit chat
  • zx81 internal ram upgrade?just curious if others have? I mean can you just rip the memory out of the ram-pack and use that.. as I'd rather just have the unit upgraded interna…

    ... some info on ZX81 memory decoding.
    RetroTechie RetroTechie May 2010 Hardware
  • Minor Update to Gasman's Midi2BEEPDon't know whether this is worthy an announcement, but for those of you who enjoyed Gasman's midi2BEEP utility, a new variant has been made called mi…

    ... having a list of) the opcodes and how they affect flags ...
    ccowley ccowley May 2010 Announcements
  • Minor Update to Gasman's Midi2BEEPDon't know whether this is worthy an announcement, but for those of you who enjoyed Gasman's midi2BEEP utility, a new variant has been made called mi…

    ... I'd say that requiring opcodes to be indented is more ...
    gasman gasman May 2010 Announcements
  • Minor Update to Gasman's Midi2BEEPDon't know whether this is worthy an announcement, but for those of you who enjoyed Gasman's midi2BEEP utility, a new variant has been made called mi…

    ... two in front of any opcodes in any future versions of ...
    ccowley ccowley May 2010 Announcements
  • Which assembler do you recommend to a (complete) newbie?OK, I am re-dusting my assembler books and want to re-dig into the Wonderful World of Assembly. Just wondering which assembler to go with. I reme…

    ... some non-standard/non-existent opcodes such as "LD HL,DE ... habit of using made-up opcodes, it means your code can ...
    ccowley ccowley June 2010 Sinclair Miscellaneous
  • Some ROM/EPROM questions...I've got a ZX Spectrum +, a +2A and +3 computers, and I've been using +3e project ROMS for a while in my +3. I was thinking about using an EEPROM or…

    ... flop IC and some port decoding (so you can do it ...
    Winston Winston June 2010 Hardware
  • How works the Line-Draw ROM routine ?The 'complete spectrum rom dissasembly.pdf' show info related to the draw rom subroutine. The Line-Draw require two sets of parameters: X,Y coordinat…

    ... ). You can use the same opcodes to work with both sets ...
    Shiru Shiru June 2010 Sinclair Basic
  • Game rarity field in the ArchiveDoes WOS have this field or some info somewhere for game rarity? If not is it possible to add one that people can vote on (obviously discounting any …

    ... still MIA due to problems decoding the tape, for example "BC ...
    ADJB ADJB June 2010 Infoseek database
  • RFC: ZXI hardware interface standardisationReposted from c.s.s to reach a wider audience [QUOTE=Andrew Owen] You may have noticed that there are more people making add-ons for the Speccy than…

    ... 's some pretty bad partial decoding by Kempston!
    (Still not ...
    BloodBaz BloodBaz July 2010 Hardware
  • RFC: ZXI hardware interface standardisationReposted from c.s.s to reach a wider audience [QUOTE=Andrew Owen] You may have noticed that there are more people making add-ons for the Speccy than…

    ... vectorized interrupts?

    - Port decoding. I'm assuming that ZXI ... devices will perform complete bus decoding, and will take into account ...
    mcleod_ideafix mcleod_ideafix July 2010 Hardware
  • MinidiscHi, i dont know if anyone has ever used a minidisc player,but i kinda like them,so i thought of having a go at recording a game tape on to one of the…

    MD uses ATRAC compression. It is designed to fool human ears, but this causes some problems with digital Spectrum signal decoding, ATRAC simply cuts off some frequencies.
    LCD LCD July 2010 Sinclair Basic
  • MinidiscHi, i dont know if anyone has ever used a minidisc player,but i kinda like them,so i thought of having a go at recording a game tape on to one of the…

    ... problems with digital Spectrum signal decoding, ATRAC simply cuts off some ...
    scarrabri scarrabri July 2010 Sinclair Basic
  • Cant DecideI have had a lot of spectrums in my time from the 16k to the +3 and as we all know they all have flaws. I am thinking about buying another and wanted…

    ... was due to only partial decoding of the Kempston port (it ...
    glancaster glancaster August 2010 Hardware
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Latest Posts

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